@article{UMJ_2020_6_2_a3,
     author = {K. Raja Chandrasekar and S. Saravanakumar},
     title = {Open packing number for some classes of perfect graphs},
     journal = {Ural mathematical journal},
     pages = {38--43},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2020_6_2_a3/}
}